Review for Quiz (7-PS3-1)

A child is pushing a cart across the floor, and the cart moves at a certain speed. When he pushes thecart with a greater force, the cart begins to move faster. Which type of energy increases when the child applies a greater force?

• chemical energy

• electrical energy

• kinetic energy

• potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

In Scenario 1, a ball is at rest on a hilltop. In Scenario 2, the ball is rolling down the hill.

Which of the following statements correctly describes the difference between kinetic energy andpotential energy in the two scenarios?

• In Scenario 1, the ball has high kinetic energy and low potential energy. In Scenario 2, the ball has low kinetic energy and high potential energy.

• In Scenario 1, the ball has high potential energy and low kinetic energy. In Scenario 2, the ball has low potential energy and high kinetic energy.

• In Scenario 1, the ball has equal amounts of kinetic and potential energy. In Scenario 2, the ball has no kinetic energy and high potential energy.

• In Scenario 1, the ball has no potential or kinetic energy. In Scenario 2, the ball has high potential and high kinetic energy.

Tags

NGSS.MS-PS3-2

Imagine you have two objects moving at the same speed. Object A has a mass of 3 kg, and Object B hasa mass of 6 kg.

How does the mass of the objects affect their kinetic energy?

• Object B will have twice the kinetic energy of Object A because kinetic energy increases directly with

  mass.

• Object B will have half the kinetic energy of Object A because kinetic energy decreases as mass

  increases.

• Object B will have the same kinetic energy as Object A because kinetic energy does not depend on

  mass.

• Object B will have three times the kinetic energy of Object A because kinetic energy is proportional to

  the square of the mass.

Tags

NGSS.MS-PS3-1

What causes the kinetic energy of an object to increase?

• Decreasing the object's speed

• Increasing the object's mass

• Increasing the object's height

• Decreasing the object's volume

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Jane made this graph of the distance her family traveled during a trip. During the first 2 hours of the trip, they traveled:

• 100 km

• 0.1 km

• 200 km

• 300 km

The mass of the basketball shown below is 4 times the mass of the baseball.

If the two balls are moving at the same speed, and the baseball has a kinetic energy of 10.0 J, what is the kinetic energy of the basketball?

• 2.5 Joules

• 10 Joules

• 20 Joules

• 40 Joules

Tags

NGSS.MS-PS3-1